CN111237375B - Shock absorber and vehicle - Google Patents
Shock absorber and vehicle Download PDFInfo
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- CN111237375B CN111237375B CN201911181635.5A CN201911181635A CN111237375B CN 111237375 B CN111237375 B CN 111237375B CN 201911181635 A CN201911181635 A CN 201911181635A CN 111237375 B CN111237375 B CN 111237375B
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- separating element
- shock absorber
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- absorber according
- tube
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G13/00—Resilient suspensions characterised by arrangement, location or type of vibration dampers
- B60G13/02—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers dissipating energy, e.g. frictionally
- B60G13/06—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers dissipating energy, e.g. frictionally of fluid type
- B60G13/08—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers dissipating energy, e.g. frictionally of fluid type hydraulic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
- F16F9/362—Combination of sealing and guide arrangements for piston rods
- F16F9/364—Combination of sealing and guide arrangements for piston rods of multi-tube dampers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/061—Mono-tubular units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/062—Bi-tubular units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/066—Units characterised by the partition, baffle or like element
- F16F9/067—Partitions of the piston type, e.g. sliding pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3235—Constructional features of cylinders
- F16F9/3242—Constructional features of cylinders of cylinder ends, e.g. caps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
- B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
- B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
- B60G15/07—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the damper being connected to the stub axle and the spring being arranged around the damper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/20—Type of damper
- B60G2202/24—Fluid damper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/40—Constructional features of dampers and/or springs
- B60G2206/41—Dampers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
- B60G2800/16—Running
- B60G2800/162—Reducing road induced vibrations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/30—Sealing arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
- F16F9/362—Combination of sealing and guide arrangements for piston rods
- F16F9/363—Combination of sealing and guide arrangements for piston rods the guide being mounted between the piston and the sealing, enabling lubrication of the guide
Abstract
The invention relates to a shock absorber and a vehicle. The damper (10) has an outer tube (11) and at least one inner tube (12) which are arranged coaxially with respect to one another, an annular gap (13) being formed between the outer tube (11) and the inner tube (12), the annular gap (13) forming a balancing chamber (14) for receiving damping oil and being fluidically connected to the inner tube (12), damping gas for preloading the damping oil being introduced into the balancing chamber (14), at least one separating element (20) being arranged in the balancing chamber (14), the separating element (20) being axially displaceable and separating the damping oil from the damping gas in a fluid-tight manner.
Description
Technical Field
The invention relates to a shock absorber and a vehicle.
Background
Shock absorbers are commonly used in automotive vehicles, racing cars and in the industrial field. In the case of shock absorbers, it is common to distinguish between monotube shock absorbers and multitube shock absorbers, with twin tube shock absorbers often being used as multitube shock absorbers. Unlike monotube shock absorbers, twin tube shock absorbers operate at lower system pressures.
A dual tube shock absorber basically comprises an inner tube and an outer tube in the form of container tubes arranged coaxially with respect to each other. In this case, a working piston is arranged in an axially displaceable manner in the central inner tube, which working piston divides the working area of the inner tube into an upper working area and a lower working area. In this case, the working area is filled with a damping medium, for example with damping oil. In this case, the central inner tube is usually designated as a cylindrical tube. In this case, the working piston is fixedly connected to a piston rod, through which the vibrations are introduced into the vibration damper and damped thereby. When the piston rod is forced into the cylindrical tube, damping oil thus flows from the lower working area through the working piston into the upper working area, a portion of the damping oil flowing through the further valve into the balancing chamber due to the additional volume of the immersed piston rod. The balancing chamber is usually constructed between the container tube and the inner tube or cylindrical tube. Damping gas for preloading damping oil is introduced into the balancing chamber, the gas being compressed by the damping oil when the damping oil is pressed in. Upon rebound, the damping oil is forced back into the working area of the cylindrical tube by the damping gas.
A damper according to the double tube embodiment is known, for example, from DE 102013204846 a1, to which reference is made by way of introduction. In this case, the shock absorber comprises an outer tube and a working cylinder in which a piston is arranged. The balancing chamber is arranged coaxially with the working cylinder around the working cylinder. The balancing chamber includes a lower oil zone and an upper gas zone. In this case, the oil and the gas communicate with each other in direct contact.
Direct contact between the oil and the gas disadvantageously causes the release of bubbles from the gas region. In this case, the bubbles are absorbed by the oil.
Disclosure of Invention
The object of the present invention is therefore to provide an improved vibration damper in which the failsafe operation of the vibration damper, in particular the prevention of the damping oil from foaming, is increased by the separation of the damping medium during operation. The invention also aims to provide a vehicle.
The invention is based on the idea of proposing a shock absorber having one outer tube and at least one inner tube which are arranged coaxially with respect to one another. An annular gap is configured between the outer tube and the inner tube, which forms a balancing chamber for receiving damping oil and is fluidly connected to the inner tube. Damping gas for preloading the damping oil is introduced into the balancing chamber, in which at least one separating element is arranged, which is axially displaceable and separates the damping oil from the damping gas in a fluid-tight manner.
The present invention has various advantages. By the liquid-tight separation of damping oil from damping gas in the balancing chamber, bubbling of damping gas and damping oil is advantageously prevented. The separating element is thus used to permanently separate the damping gas from the damping oil.
A further advantage provided by the invention is that the vibration damper is prevented from rolling out when cold by the liquid-tight separation of the damping oil and the damping gas. Thus, the shock absorber of the present invention advantageously provides a low noise level in addition to a lower system pressure.
In a preferred embodiment, the separating element has an annular configuration. In this case, a structurally simple design of the separating element is advantageous. Furthermore, a cost-effective manufacture of the separating element is thus facilitated.
In a further preferred embodiment, the separating element bears in a fluid-tight manner against the outer tube and/or the inner tube by means of at least one sealing lip. This has the advantage that a continuous sealing of the damping oil against the damping gas during operation is achieved. Thus preventing absorption of the released vapor bubbles into the damping oil.
In a particularly preferred embodiment, the separating element starting from each front face comprises a narrowing of the cross section, so that at least one sealing lip edge is formed on the sealing lip. In other words, the sealing lips can each be formed on a front face, which sealing lips comprise at least one sealing lip edge. In this case, the first sealing lip of the separating element is assigned to the damping oil. A second sealing lip is assigned to the damping gas. An improved sealing effect of the separating element is advantageously achieved by the configuration of the two sealing lips. The fail-safe operation of the damper is additionally increased. In this case, the sealing lip edge of the first sealing lip can advantageously bear in a fluid-tight manner against the outer tube and/or the inner tube. Furthermore, the sealing lip edge of the second sealing lip can bear in a fluid-tight manner against the outer tube and/or the inner tube.
The separating element preferably comprises an outer compression chamber which is radially outwardly formed between the separating element and the outer tube and is delimited axially by the sealing lip. The separating element can also comprise an internal compression chamber which is configured radially inwardly between the separating element and the inner tube and is delimited axially by the sealing lip. A related advantage is that the material of the separating element can yield in the outer and/or inner compression chamber in case of elastic deformation or compression of the separating element. Damage to the separating element is thus prevented. Furthermore, in the event of a leakage of the sealing lip, the outer compression chamber and/or the inner compression chamber can advantageously form a barrier by means of which the penetration of gas bubbles into the damping oil is prevented. The compression chamber may be configured in such a way that damping oil and/or damping gas may be received in the compression chamber. In this case, the respective compression chamber can be formed by a material constriction in the separating element. In this case, the material constriction essentially forms a narrowing of the cross section of the separating element. The corresponding compression chamber may have a triangular cross-sectional shape. The corresponding compression chamber may also comprise another cross-sectional shape. Furthermore, the separating element may also comprise a plurality of outer and/or inner compression chambers.
The separating element may have an asymmetrical configuration in the axial longitudinal direction. In other words, the sealing lips of the separating element can be configured asymmetrically with respect to one another in the direction of the longitudinal axis of the separating element. The sealing lips thus comprise mutually different cross-sectional forms. In this case, the longitudinal axis of the separating element corresponds to the axis of rotation of the separating element. It is therefore advantageous if the sealing lip of the separating element comprises a modified cross-sectional shape which is adapted to the relevant operating conditions. In this case, the separating element comprises a shape which is biconical in cross-section, wherein the respective conical base forms the front face of the separating element. Furthermore, the separating element can have a rotationally symmetrical configuration. This facilitates a simple and cost-effective manufacture of the separating element.
In a preferred embodiment, the separating element is constructed in one piece. The separating element can advantageously be manufactured simply and cost-effectively by a standardized manufacturing process, for example by an injection moulding process, an extrusion process or some other manufacturing process.
In a further preferred embodiment, the separating element comprises at least one reinforcing ring which is at least partially engaged in the separating element in the axial direction. The reinforcing ring can also be completely engaged in the separating element in the axial direction. In other words, the reinforcement ring can also be completely embedded in the separating element. The reinforcing ring may be made of plastic or metal. The reinforcement ring may also be made of rubber or some other elastic material. The reinforcement ring has the advantage that the separating element is protected against uncontrolled deformation under high compression forces. The reinforcement ring thus serves to provide dimensional stability of the separating element in the presence of compressive forces.
The separating element can have at least one reinforcing disk which is embedded in the front face of the separating element and terminates flush with the front face of the separating element. In this case, it is advantageous if the reinforcing disk reinforces the front face of the separating element and provides protection against uncontrolled deformation under high compression forces. The reinforcement disc may be formed by a reinforcement element having a circular cross-section. In this case, the reinforcing element may be formed by an O-ring. In this case, the reinforcing element can also be made of rubber or some other elastic material.
The separating element preferably has an elastically deformable configuration. This has the advantage that damage to the separating element is prevented by the generation of high compressive forces.
Another feature of the present invention relates to a vehicle having at least one shock absorber of the above-described type. In this case, reference is made to the advantages mentioned in connection with the damper. Further, alternatively or additionally, the vehicle may include a single unique feature or a combination of multiple unique features mentioned above with respect to the shock absorber.
Drawings
The invention is described in more detail below with reference to the accompanying drawings. The illustrated embodiment shows an example of how the shock absorber of the present invention may be constructed.
Wherein the content of the first and second substances,
figure 1 shows a longitudinal sectional view of a shock absorber, in particular a dual tube shock absorber, with a separating element according to an exemplary embodiment of the present invention;
fig. 2 shows a longitudinal sectional view of the separating element according to fig. 1;
FIG. 3 shows a longitudinal cross-sectional view of a separating element with a reinforcing ring according to an exemplary embodiment of the invention;
FIG. 4 shows a longitudinal cross-sectional view of a separating element with two reinforcement discs according to another exemplary embodiment of the invention;
fig. 5 shows a longitudinal section through a separating element with two reinforcing elements according to another exemplary embodiment of the present invention;
fig. 6 shows a longitudinal sectional view of a separating element with two sealing elements according to another exemplary embodiment of the invention.
Detailed Description
Dual tube shock absorbers generally comprise an inner tube and an outer tube in the form of a containment tube arranged in a coaxial manner with respect to each other. In this case, a working piston which divides the working area of the inner tube into a first working area and a second working area is arranged in the central inner tube in an axially displaceable manner. In this case, the working area is filled with a damping medium, for example with damping oil. In this case, the central inner tube is usually designated as a cylindrical tube. In this case, the working piston is fixedly connected to a piston rod, through which the vibrations are introduced into the vibration damper and damped thereby. When the piston rod is forced into the cylindrical tube, damping oil is caused to flow from the first working area through the working piston into the second working area, a portion of the damping oil flowing through the other valve into the balancing chamber due to the additional volume of the immersed piston rod. The balancing chamber is usually constructed between the container tube and the inner tube or cylindrical tube. Damping gas for preloading the damping oil is introduced into the balancing chamber, which is compressed when forced through the damping oil. Upon rebound, the damping oil is forced back into the working area of the cylindrical tube by the damping gas.
Figure 1 shows a longitudinal cross-sectional view of a shock absorber 10, in particular a dual tube shock absorber. In the following description, shock absorber 10 is generally referred to as a dual tube shock absorber. In this case, the separating element 20 can be used to separate damping oil from damping gas in a double tube damper. It is also conceivable that the separating element 20 is applied in a multi-tube damper comprising more than two tubes.
The double tube shock absorber mainly comprises an outer tube 11 and an inner tube 12. In this case, the tubes 11, 12 are arranged coaxially with respect to each other. An annular gap 13 is formed between the outer tube 11 and the inner tube 12, the annular gap 13 forming a balancing chamber 14 for receiving damping gas and damping oil.
The dual tube shock absorber further comprises a working piston 40, by means of which working piston 40 a first working area 41 is fluidly connected to a second working area 42 of the inner tube 12 via a valve. In this case, the working areas 41, 42 are filled with damping oil. A working piston 40 is arranged in the inner tube 12 in an axially displaceable manner and is connected to the distal end of a piston rod 43. Furthermore, a piston rod guide 44 is arranged on an axial end of the double tube damper, by means of which piston rod guide 44 the piston rod 43 is guided in the event of an axial movement, in particular during operation. The piston rod guide 44 also comprises a seal which seals the dual tube shock absorber in a fluid-tight manner from the outside. The piston rod guide 44 abuts with an axially outer front face against a sealing cover 45. The piston rod guide 44 abuts with an axially inner front face against a sealing element 47.
The seal cover 45 forms an axial end portion of the double tube damper, in which the outer tube 11 is seated. In other words, the outer tube 11 is radially surrounded by the sealing cover 45. In this case, the sealing cover 45 can completely or in sections, in particular partially, radially surround the outer tube. The outer tube 11 is arranged with a first outer tube end 11a, which first outer tube end 11a is located radially between the sealing cover 45 and the piston rod guide 44. The sealing element 47 has a sealing element shoulder which engages in the inner tube 12. The sealing element 47 also comprises two seals, a first seal (in particular an outer seal) sealing the balancing chamber 14b with respect to the outer tube 11 and a second seal (in particular an inner seal) sealing the balancing chamber 14b with respect to the inner tube 12.
The dual tube shock absorber further comprises a foot valve 30 and a foot body 46 engaged in the outer tube 11. In this case, the bottom body 46 is arranged on the second outer tube end 11b of the outer tube 11. A fastening device 33 for fastening the double tube damper to the motor vehicle is further arranged on the bottom body 46. In this case, the bottom body 46 forms the other axial end of the double tube damper, which is arranged axially facing the sealing cover 45. A foot valve 30 is connected to the inner tube 12. The second working area 42 is fluidly connected to the balance chamber 14 through the foot valve 30. Damping gas for preloading damping oil is introduced into the balancing chamber 14. A separating element 20 is also arranged in the balancing chamber 14. It is also possible to arrange a plurality of separating elements 20 in the balancing chamber 14. The separating element 20 is configured such that it completely surrounds the inner tube 12. The separating element 20 can also be designed such that it surrounds the inner tube 12 in sections. The separating element 20 divides the balancing chamber 14 into a first balancing chamber 14a and a second balancing chamber 14 b. In this case, the first balance chamber 14a forms a damping oil region. The second balance chamber 14b forms a damping gas region.
The separating element 20 is axially displaceable and separates the damping oil and the damping gas from one another in a fluid-tight manner. As can be clearly understood in fig. 2 to 4, the separating element 20 comprises two sealing lips 21. According to fig. 1, the separating element 20 in this case abuts in a fluid-tight manner against the outer tube 11 and the inner tube 12, respectively, by means of a sealing lip 21. The separating element 20 and the sealing lip 21 are described in more detail below.
When damping oil is forced from the second working area 42 of the inner tube 12 into the first balance chamber 14a during operation, the damping oil bears against the axially displaceable separating element 20 and compresses the damping gas in the second balance chamber 14 b. Thus, the fluid-tight separation of the damping oil from the damping gas advantageously prevents the release of air bubbles and damage to valves and other hydraulic components. Furthermore, cold booming is avoided, thus achieving a low noise level during operation of the shock absorber.
Fig. 2 shows a longitudinal section through the separating element 20. In this case, the separating element 20 has an annular configuration. As shown in fig. 1, the separating element 20 comprises two sealing lips 21. The sealing lips 23 are formed on the separating element 20 directly opposite one another in the axial direction. The sealing lips 21 are each delimited in the axial direction by a front face 23 of the separating element 20. The front faces 23 thus each form a distal end of the separating element 20. The separating element 20 may also comprise a single sealing lip 21. Furthermore, the separating element 20 may comprise a plurality of sealing lips 21.
The separating element 20 is constructed in a rotationally symmetrical manner. The longitudinal axis of the separating element 20 corresponds to the axis of rotation. The separating element 20 comprises a narrowing 24 in each case starting from the cross section of the front face 23. In this case, two sealing lip edges 22 are formed on each sealing lip 21. The sealing lip 21 may also comprise a single sealing lip edge 22. Furthermore, the sealing lip 21 may also comprise a plurality of sealing lip edges 22. In the case of a double-tube damper, the sealing lip 22 bears in a fluid-tight manner against the outer tube 11 and the inner tube 12.
The separating element 20 comprises an outer compression chamber 25, the outer compression chamber 25 being radially outwardly formed between the separating element 20 and the outer tube 11 and axially delimited by the sealing lip 21. The outer compression chamber 25 forms an outer free chamber. With the separating element 20 installed in the shock absorber 10, the outer free space is delimited by the sealing lip 21 and the outer tube 11. The separating element 20 also has an inner compression chamber 26, the inner compression chamber 26 being formed radially inwardly between the separating element 20 and the inner tube 12 of the double tube damper and being delimited axially by the sealing lip 21. The internal compression chamber 26 forms an internal free chamber. In the installed state in the vibration damper 10, the inner free space is delimited by the sealing lip 21 and the inner tube 12.
The separating element 20 may also comprise a plurality of outer and/or inner compression chambers 25, 26. The respective compression chambers 25, 26 may comprise a triangular cross-sectional shape. The respective compression chambers 25, 26 may also comprise another cross-sectional shape.
The separating element 20 is configured asymmetrically in the axial longitudinal direction. The separating element 20 can also be designed symmetrically in the axial longitudinal direction. The cross-section of the separating element 20 is configured in the shape of a double cone. The cross section of the separating element 20 essentially comprises a material constriction. The material constrictions are configured in a rotationally symmetrical manner on the inner and outer circumference of the separating element 20. In this case, the material constriction forms a double-conical shape of the cross section of the separating element 20. The material constriction can also be formed in sections on the separating element 20. Thus, the cross-section of the separating element 20 may also comprise some other shape.
The material constrictions of the separating element 20 may form compression chambers 25, 26. Furthermore, in this case, the constriction 24 of the cross section of the separating element 20 can be formed by a material constriction. The compression chambers 25, 26 and/or the narrowing 24 of the cross section of the separating element 20 are thus formed by material constrictions.
The separating element 20 may typically be made of an elastic material, such as rubber or plastic. The separating element 20 may also be made of metal. Furthermore, it is also conceivable that the separating element 20 is formed from a combination of rubber, plastic and metal. The separating element 20 has an elastically deformable configuration. The separating element 20 can also be of rigid, in particular non-deformable, construction. According to fig. 2, the separating element 20 is of one-piece construction. The separating element 20 may also be formed by two or more annular separating element portions.
The embodiment of the decoupling element 20 shown in fig. 1 and 2, and the arrangement in the vibration damper 10 and the function of the decoupling element 20 correspond to the embodiment, arrangement and function of the decoupling element 20 shown below in fig. 3 and 5.
Fig. 3 shows a separating element 20 with a reinforcing ring 27. As can be understood from fig. 3, the reinforcing ring 27 is partially engaged in the separating element 20 in the axial direction. In this case, the reinforcing ring 27 is engaged in the separating element 20 in such a way that the reinforcing ring 27 projects with its axial ends over the material constriction in the separating element 20 shown in fig. 2. The reinforcing ring 27 projects with the other axial end above one of the two front faces 23 of the separating element 20. In this case, the longitudinal cross section of the reinforcing ring 27 engaged in the separating element 20 is greater than the longitudinal cross section of the reinforcing ring 27 projecting beyond the front face 23. The reinforcement ring 27 can also be provided completely in the separating element 20. In other words, the reinforcement ring 27 can be completely embedded in the separating element 20. The reinforcement ring 27 may be made of plastic and/or metal. The reinforcing ring may also be made of rubber or some other elastic material. It is also conceivable that the reinforcement ring 27 is formed from a combination of the above-mentioned materials. The reinforcing ring 27 may also be made of another unspecified material.
According to fig. 4, a separating element 20 with two reinforcing discs 28 is shown. A respective reinforcing disk 28 is inserted in each case into one of the two front faces 23 of the separating element 20. The respective reinforcing disk 28 terminates flush with the front face 23 of the separating element 20. A corresponding reinforcing disk 28 can also be embedded in the front face 23 which projects above the front face 23. The separating element 20 may also comprise a single reinforcing disc 28. In this case, the reinforcing disk 28 is embedded in only one of the two front faces 23. In this case, the reinforcing disk 28 can likewise terminate flush with the front face 23 or project above the front face 23 embedded therein. The reinforcing disk 28 may be made of plastic and/or metal. The corresponding reinforcing disc 28 may also be made of rubber or some other elastic material. It is generally contemplated that the reinforcement disc 28 is formed from a combination of the above materials. The reinforcing disk 28 may also be made of another unspecified material.
Fig. 5 shows a separating element 20 with two reinforcing elements 29. The reinforcing element 29 comprises a ring-shaped, in particular circular, cross section. In this case, the reinforcing element 29 may be formed by an O-ring or an annular spring, respectively. The reinforcing element 29 may also comprise an oval cross-section. The reinforcing element 29 may be made of plastic and/or metal. The reinforcing ring may also be made of rubber or some other elastic material.
One reinforcing element 29 is inserted in each case into one of the two front faces 23 of the separating element 20. The respective reinforcing element 29 projects above the front face 23 of the separating element 20. The reinforcing element 29 can also be embedded in the front face 23 in such a way that the reinforcing element 29 terminates flush with the front face. It is also conceivable for the respective reinforcing element 29 to be completely embedded in the associated sealing lip 21. For this purpose, the reinforcing element 29 can be molded, for example, into the respective sealing lip 21. The separating element 20 may also comprise a single reinforcing element 29. In this case, the reinforcing element 29 is embedded in only one of the two front faces 23.
As shown in fig. 3, 4 and 5, the reinforcement ring 27, the reinforcement disc 28 and the reinforcement element 29 generally serve to dimensionally stabilize the decoupling element 20 in the event of compressive forces during operation of the shock absorber 10. As a result, uncontrolled deformation and damage of the separating element 20 is prevented.
In fig. 6a separating element 20 comprising two sealing elements 31a, 31b is shown. The separating element 20 is of annular, in particular hollow-cylindrical configuration. According to fig. 6, the separating element 20 is of one-piece construction. Thus, the separating element 20 is of S-shaped configuration in cross-section. The separating element 20 may also be formed by two or more annular separating element portions. The separating element 20 has a rotationally symmetrical configuration. The longitudinal axis of the separating element 20 corresponds to the axis of rotation.
The separating element 20 may be made of an elastic material, such as rubber or plastic. The separating element 20 may also be made of metal. Furthermore, it is also conceivable that the separating element 20 is made of a combination of rubber, plastic and metal. The separating element 20 has an elastically deformable configuration. The separating element 20 can also be of rigid, in particular non-deformable, construction.
The separating element 20 comprises an outer groove 32a and an inner groove 32 b. The outer groove 32a is formed radially on the outside in the circumferential direction in the separating element 20. In this case, the outer groove 32a has a radially outward open configuration. The outer groove 32a is arranged on a first axial end region 34 of the separating element 20. The outer groove 32a is arranged at a distance from the front face 23 of the first end region 34.
The inner groove 32b is formed in the separating element 20 radially on the inside in the circumferential direction. In this case, inner groove 32b has a radially inwardly open configuration. The inner groove 32b is arranged on the second axial end region 35 of the separating element 20. In this case, the second end region 35 is arranged axially opposite the first end region 34. The inner groove 32b is arranged at a distance from the front face 23 of the second end region 34.
The sealing elements 31a, 31b form an outer sealing element 31a and an inner sealing element 31 b. The sealing elements 31a, 31b each have an annular configuration. The sealing elements 31a, 31b comprise a ring-shaped, in particular circular, cross section. The sealing elements 31a, 31b may also have an oval cross section.
The outer sealing element 31a is arranged lying flat, in particular embedded in the outer groove 32 a. In the state in which the separating element 20 is mounted in the balancing chamber 14 of the shock absorber 10, the outer sealing element 31a forms a fluid-tight connection between the separating element 20 and the outer tube 11.
The inner sealing element 31b is arranged to lie flat, in particular to be embedded in the inner groove 32 b. In the state in which the separating element 20 is mounted in the equalizing chamber 14 of the shock absorber 10, the inner sealing element 31b forms a fluid-tight connection between the separating element 20 and the inner tube 12.
The separating element 20 according to fig. 6 is not limited to two sealing elements 31a, 31 b. It is conceivable that the separating element 20 comprises more than two sealing elements.
List of reference numerals
10 vibration damper
11 outer tube
11a first outer tube end
11b second outer tube end
12 inner pipe
13 annular gap
14 balance cavity
14a first balance chamber
14b second balance chamber
20 separating element
21 sealing lip
22 sealing lip edge
23 front face of the separating element
Narrowing of 24 cross-section
25 external compression chamber
26 internal compression chamber
27 reinforcing ring
28 reinforcing disc
29 reinforcing element
31a external sealing element
31b internal seal member
30 bottom valve
32a outer groove
32b inner groove
33 fastening device
34 first axial end region
35 second axial end region
40 working piston
41 first working area
42 second work area
43 piston rod
44 piston rod guide
45 sealing cover
46 bottom body
47 sealing element
Claims (12)
1. A vibration damper (10) having an outer tube (11) and at least one inner tube (12) arranged coaxially with respect to one another, an annular gap (13) being configured between the outer tube (11) and the inner tube (12), the annular gap (13) forming a balancing chamber (14) for receiving damping oil and being fluidly connected to the inner tube (12), damping gas for preloading the damping oil being introduced into the balancing chamber (14),
it is characterized in that the preparation method is characterized in that,
at least one separating element (20) is arranged in the balancing chamber (14), the separating element (20) being axially displaceable and separating the damping oil from the damping gas in a fluid-tight manner; the separating element (20) has an outer compression chamber (25), the outer compression chamber (25) being radially outwardly configured between the separating element (20) and the outer tube (11); the separating element (20) having at least one sealing lip (21) bears in a fluid-tight manner against the outer tube (11) and/or the inner tube (12).
2. The shock absorber as set forth in claim 1,
it is characterized in that the preparation method is characterized in that,
the separating element (20) has an annular configuration.
3. The shock absorber according to the preceding claim 2,
it is characterized in that the preparation method is characterized in that,
the separating element (20) starting from each front face (23) comprises a cross-sectional constriction (24) such that at least one sealing lip edge (22) is formed on the sealing lip (21).
4. The shock absorber according to the preceding claim 3,
it is characterized in that the preparation method is characterized in that,
the outer compression chamber (25) is delimited axially by the sealing lip (21).
5. Shock absorber according to one of the preceding claims 1-2,
it is characterized in that the preparation method is characterized in that,
the separating element (20) has an inner compression chamber (26), the inner compression chamber (26) being radially inwardly formed between the separating element (20) and the inner tube (12) and being axially delimited by the sealing lip (21).
6. Shock absorber according to one of the preceding claims 1-2,
it is characterized in that the preparation method is characterized in that,
the separating element (20) is configured asymmetrically in the axial longitudinal direction.
7. Shock absorber according to any of the preceding claims 1-2,
it is characterized in that the preparation method is characterized in that,
the separating element (20) is designed in a rotationally symmetrical manner.
8. Shock absorber according to one of the preceding claims 1-2,
it is characterized in that the preparation method is characterized in that,
the separating element (20) is designed as a single piece.
9. Shock absorber according to one of the preceding claims 1-2,
it is characterized in that the preparation method is characterized in that,
the separating element (20) has at least one reinforcing ring (27), the reinforcing ring (27) being at least partially engaged in the separating element (20) in the axial direction.
10. Shock absorber according to one of the preceding claims 1-2,
it is characterized in that the preparation method is characterized in that,
the separating element (20) has at least one reinforcing disk (28), the reinforcing disk (28) being embedded in a front face (23) of the separating element (20) and ending flush with the front face (23) of the separating element (20).
11. Shock absorber according to one of the preceding claims 1-2,
it is characterized in that the preparation method is characterized in that,
the separating element (20) is configured in an elastically deformable manner.
12. A vehicle having at least one shock absorber according to claims 1-11.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018220628.7 | 2018-11-29 | ||
| DE102018220628.7A DE102018220628B4 (en) | 2018-11-29 | 2018-11-29 | Vibration damper and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111237375A CN111237375A (en) | 2020-06-05 |
| CN111237375B true CN111237375B (en) | 2022-05-17 |
Family
ID=70681299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911181635.5A Active CN111237375B (en) | 2018-11-29 | 2019-11-27 | Shock absorber and vehicle |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US11320016B2 (en) |
| CN (1) | CN111237375B (en) |
| DE (1) | DE102018220628B4 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018220630B4 (en) * | 2018-11-29 | 2024-01-11 | Thyssenkrupp Ag | Adjustable vibration damper and vehicle with such a vibration damper |
| DE102022208833A1 (en) | 2022-08-25 | 2024-03-07 | Thyssenkrupp Ag | Vibration damper for a vehicle |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20200173514A1 (en) | 2020-06-04 |
| DE102018220628B4 (en) | 2022-08-18 |
| DE102018220628A1 (en) | 2020-06-04 |
| CN111237375A (en) | 2020-06-05 |
| US11320016B2 (en) | 2022-05-03 |
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